| Year | 1950 |
| Date | 27-Jul |
| Volume | 103 |
| Issue | 2,566 |
| Page | 150 |
| Category | Petrol Engine Topics |
| Part | |
| Title | A 10 c.c. Twin Four-Stroke. "Seagull" |
| Author | Edgar T.Westbury |
| Notes | Sectional end view of crankcase, crankcase and sump, centre bearing cap, cylinder seatings, tappet seatings, camshaft tunnel, breather orifice |